call into hwcomposer HAL when present

Change-Id: I70f31c69a9436a43860e78977442863ecba6d27b

services/surfaceflinger/Android.mk

@@ -5,6 +5,7 @@ LOCAL_SRC_FILES:= \
     clz.cpp.arm \
     DisplayHardware/DisplayHardware.cpp \
     DisplayHardware/DisplayHardwareBase.cpp \
+    DisplayHardware/HWComposer.cpp \
     BlurFilter.cpp.arm \
     GLExtensions.cpp \
     Layer.cpp \

services/surfaceflinger/DisplayHardware/DisplayHardware.cpp

@@ -36,11 +36,11 @@
 
 #include "DisplayHardware/DisplayHardware.h"
 
-#include <hardware/copybit.h>
 #include <hardware/overlay.h>
 #include <hardware/gralloc.h>
 
 #include "GLExtensions.h"
+#include "HWComposer.h"
 
 using namespace android;
 
@@ -76,7 +76,7 @@ DisplayHardware::DisplayHardware(
         const sp<SurfaceFlinger>& flinger,
         uint32_t dpy)
     : DisplayHardwareBase(flinger, dpy),
-      mFlags(0)
+      mFlags(0), mHwc(0)
 {
     init(dpy);
 }
@@ -262,6 +262,17 @@ void DisplayHardware::init(uint32_t dpy)
 
     // Unbind the context from this thread
     eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+
+
+    // initialize the H/W composer
+    mHwc = new HWComposer();
+    if (mHwc->initCheck() == NO_ERROR) {
+        mHwc->setFrameBuffer(mDisplay, mSurface);
+    }
+}
+
+HWComposer& DisplayHardware::getHwComposer() const {
+    return *mHwc;
 }
 
 /*
@@ -317,7 +328,12 @@ void DisplayHardware::flip(const Region& dirty) const
     }
     
     mPageFlipCount++;
-    eglSwapBuffers(dpy, surface);
+
+    if (mHwc->initCheck() == NO_ERROR) {
+        mHwc->commit();
+    } else {
+        eglSwapBuffers(dpy, surface);
+    }
     checkEGLErrors("eglSwapBuffers");
 
     // for debugging

services/surfaceflinger/DisplayHardware/DisplayHardware.h

@@ -34,12 +34,11 @@
 #include "DisplayHardware/DisplayHardwareBase.h"
 
 struct overlay_control_device_t;
-struct framebuffer_device_t;
-struct copybit_image_t;
 
 namespace android {
 
 class FramebufferNativeWindow;
+class HWComposer;
 
 class DisplayHardware : public DisplayHardwareBase
 {
@@ -80,6 +79,9 @@ public:
     uint32_t getPageFlipCount() const;
     EGLDisplay getEGLDisplay() const { return mDisplay; }
     overlay_control_device_t* getOverlayEngine() const { return mOverlayEngine; }
+
+    // Hardware Composer
+    HWComposer& getHwComposer() const;
     
     status_t compositionComplete() const;
     
@@ -107,6 +109,8 @@ private:
     GLint           mMaxViewportDims;
     GLint           mMaxTextureSize;
     
+    HWComposer*     mHwc;
+
     sp<FramebufferNativeWindow> mNativeWindow;
     overlay_control_device_t* mOverlayEngine;
 };

services/surfaceflinger/DisplayHardware/HWComposer.cpp

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+
+#include <hardware/hardware.h>
+
+#include <cutils/log.h>
+
+#include <EGL/egl.h>
+
+#include "HWComposer.h"
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+HWComposer::HWComposer()
+    : mModule(0), mHwc(0), mList(0),
+      mDpy(EGL_NO_DISPLAY), mSur(EGL_NO_SURFACE)
+{
+    int err = hw_get_module(HWC_HARDWARE_MODULE_ID, &mModule);
+    LOGW_IF(err, "%s module not found", HWC_HARDWARE_MODULE_ID);
+    if (err == 0) {
+        err = hwc_open(mModule, &mHwc);
+        LOGE_IF(err, "%s device failed to initialize (%s)",
+                HWC_HARDWARE_COMPOSER, strerror(-err));
+    }
+}
+
+HWComposer::~HWComposer() {
+    free(mList);
+    if (mHwc) {
+        hwc_close(mHwc);
+    }
+}
+
+status_t HWComposer::initCheck() const {
+    return mHwc ? NO_ERROR : NO_INIT;
+}
+
+void HWComposer::setFrameBuffer(EGLDisplay dpy, EGLSurface sur) {
+    mDpy = (hwc_display_t)dpy;
+    mSur = (hwc_surface_t)sur;
+}
+
+status_t HWComposer::createWorkList(size_t numLayers) {
+    if (mHwc && (!mList || mList->numHwLayers < numLayers)) {
+        free(mList);
+        size_t size = sizeof(hwc_layer_list) + numLayers*sizeof(hwc_layer_t);
+        mList = (hwc_layer_list_t*)malloc(size);
+        mList->flags = HWC_GEOMETRY_CHANGED;
+        mList->numHwLayers = numLayers;
+    }
+    return NO_ERROR;
+}
+
+status_t HWComposer::prepare() const {
+    int err = mHwc->prepare(mHwc, mList);
+    return (status_t)err;
+}
+
+status_t HWComposer::commit() const {
+    int err = mHwc->set(mHwc, mDpy, mSur, mList);
+    mList->flags &= ~HWC_GEOMETRY_CHANGED;
+    return (status_t)err;
+}
+
+HWComposer::iterator HWComposer::begin() {
+    return mList ? &(mList->hwLayers[0]) : NULL;
+}
+
+HWComposer::iterator HWComposer::end() {
+    return mList ? &(mList->hwLayers[mList->numHwLayers]) : NULL;
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android

services/surfaceflinger/DisplayHardware/HWComposer.h

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SF_HWCOMPOSER_H
+#define ANDROID_SF_HWCOMPOSER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <EGL/egl.h>
+
+#include <hardware/hwcomposer.h>
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+class HWComposer
+{
+public:
+
+    HWComposer();
+    ~HWComposer();
+
+    status_t initCheck() const;
+
+    // tells the HAL what the framebuffer is
+    void setFrameBuffer(EGLDisplay dpy, EGLSurface sur);
+
+    // create a work list for numLayers layer
+    status_t createWorkList(size_t numLayers);
+
+    // Asks the HAL what it can do
+    status_t prepare() const;
+
+    // commits the list
+    status_t commit() const;
+
+
+    typedef hwc_layer_t const * const_iterator;
+    typedef hwc_layer_t* iterator;
+
+    iterator begin();
+    iterator end();
+
+private:
+    hw_module_t const*      mModule;
+    hwc_composer_device_t*  mHwc;
+    hwc_layer_list_t*       mList;
+    hwc_display_t           mDpy;
+    hwc_surface_t           mSur;
+};
+
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_SF_HWCOMPOSER_H

services/surfaceflinger/Layer.cpp

@@ -35,6 +35,7 @@
 #include "Layer.h"
 #include "SurfaceFlinger.h"
 #include "DisplayHardware/DisplayHardware.h"
+#include "DisplayHardware/HWComposer.h"
 
 
 #define DEBUG_RESIZE    0
@@ -177,6 +178,62 @@ status_t Layer::setBuffers( uint32_t w, uint32_t h,
     return NO_ERROR;
 }
 
+void Layer::setGeometry(hwc_layer_t* hwcl)
+{
+    hwcl->compositionType = HWC_FRAMEBUFFER;
+    hwcl->hints = 0;
+    hwcl->flags = 0;
+    hwcl->transform = 0;
+    hwcl->blending = HWC_BLENDING_NONE;
+
+    // we can't do alpha-fade with the hwc HAL
+    const State& s(drawingState());
+    if (s.alpha < 0xFF) {
+        hwcl->flags = HWC_SKIP_LAYER;
+        return;
+    }
+
+    // we can only handle simple transformation
+    if (mOrientation & Transform::ROT_INVALID) {
+        hwcl->flags = HWC_SKIP_LAYER;
+        return;
+    }
+
+    hwcl->transform = mOrientation;
+
+    if (needsBlending()) {
+        hwcl->blending = mPremultipliedAlpha ?
+                HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE;
+    }
+
+    hwcl->displayFrame.left   = mTransformedBounds.left;
+    hwcl->displayFrame.top    = mTransformedBounds.top;
+    hwcl->displayFrame.right  = mTransformedBounds.right;
+    hwcl->displayFrame.bottom = mTransformedBounds.bottom;
+
+    hwcl->visibleRegionScreen.rects =
+            reinterpret_cast<hwc_rect_t const *>(
+                    visibleRegionScreen.getArray(
+                            &hwcl->visibleRegionScreen.numRects));
+}
+
+void Layer::setPerFrameData(hwc_layer_t* hwcl) {
+    sp<GraphicBuffer> buffer(mBufferManager.getActiveBuffer());
+    if (buffer == NULL) {
+        // this situation can happen if we ran out of memory for instance.
+        // not much we can do. continue to use whatever texture was bound
+        // to this context.
+        hwcl->handle = NULL;
+        return;
+    }
+    hwcl->handle = const_cast<native_handle_t*>(buffer->handle);
+    // TODO: set the crop value properly
+    hwcl->sourceCrop.left   = 0;
+    hwcl->sourceCrop.top    = 0;
+    hwcl->sourceCrop.right  = buffer->width;
+    hwcl->sourceCrop.bottom = buffer->height;
+}
+
 void Layer::reloadTexture(const Region& dirty)
 {
     sp<GraphicBuffer> buffer(mBufferManager.getActiveBuffer());

services/surfaceflinger/Layer.h

@@ -68,6 +68,8 @@ public:
     bool isFixedSize() const;
 
     // LayerBase interface
+    virtual void setGeometry(hwc_layer_t* hwcl);
+    virtual void setPerFrameData(hwc_layer_t* hwcl);
     virtual void onDraw(const Region& clip) const;
     virtual uint32_t doTransaction(uint32_t transactionFlags);
     virtual void lockPageFlip(bool& recomputeVisibleRegions);

services/surfaceflinger/LayerBase.cpp

@@ -307,6 +307,15 @@ void LayerBase::drawRegion(const Region& reg) const
     }
 }
 
+void LayerBase::setGeometry(hwc_layer_t* hwcl) {
+    hwcl->flags |= HWC_SKIP_LAYER;
+}
+
+void LayerBase::setPerFrameData(hwc_layer_t* hwcl) {
+    hwcl->compositionType = HWC_FRAMEBUFFER;
+    hwcl->handle = NULL;
+}
+
 void LayerBase::draw(const Region& clip) const
 {
     // reset GL state

services/surfaceflinger/LayerBase.h

@@ -35,6 +35,8 @@
 
 #include <pixelflinger/pixelflinger.h>
 
+#include <hardware/hwcomposer.h>
+
 #include "Transform.h"
 
 namespace android {
@@ -108,6 +110,10 @@ public:
 
     virtual const char* getTypeId() const { return "LayerBase"; }
 
+    virtual void setGeometry(hwc_layer_t* hwcl);
+
+    virtual void setPerFrameData(hwc_layer_t* hwcl);
+
     /**
      * draw - performs some global clipping optimizations
      * and calls onDraw().

services/surfaceflinger/SurfaceFlinger.cpp

@@ -52,6 +52,7 @@
 #include "SurfaceFlinger.h"
 
 #include "DisplayHardware/DisplayHardware.h"
+#include "DisplayHardware/HWComposer.h"
 
 /* ideally AID_GRAPHICS would be in a semi-public header
  * or there would be a way to map a user/group name to its id
@@ -76,6 +77,7 @@ SurfaceFlinger::SurfaceFlinger()
         mAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER"),
         mDump("android.permission.DUMP"),
         mVisibleRegionsDirty(false),
+        mHwWorkListDirty(false),
         mDeferReleaseConsole(false),
         mFreezeDisplay(false),
         mFreezeCount(0),
@@ -368,6 +370,11 @@ bool SurfaceFlinger::threadLoop()
     // post surfaces (if needed)
     handlePageFlip();
 
+    if (UNLIKELY(mHwWorkListDirty)) {
+        // build the h/w work list
+        handleWorkList();
+    }
+
     const DisplayHardware& hw(graphicPlane(0).displayHardware());
     if (LIKELY(hw.canDraw() && !isFrozen())) {
         // repaint the framebuffer (if needed)
@@ -443,6 +450,7 @@ void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
         handleTransactionLocked(transactionFlags, ditchedLayers);
         mLastTransactionTime = systemTime() - now;
         mDebugInTransaction = 0;
+        mHwWorkListDirty = true;
         // here the transaction has been committed
     }
 
@@ -450,6 +458,7 @@ void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
      * Clean-up all layers that went away
      * (do this without the lock held)
      */
+
     const size_t count = ditchedLayers.size();
     for (size_t i=0 ; i<count ; i++) {
         if (ditchedLayers[i] != 0) {
@@ -683,8 +692,8 @@ void SurfaceFlinger::commitTransaction()
 void SurfaceFlinger::handlePageFlip()
 {
     bool visibleRegions = mVisibleRegionsDirty;
-    LayerVector& currentLayers = const_cast<LayerVector&>(
-            mDrawingState.layersSortedByZ);
+    LayerVector& currentLayers(
+            const_cast<LayerVector&>(mDrawingState.layersSortedByZ));
     visibleRegions |= lockPageFlip(currentLayers);
 
         const DisplayHardware& hw = graphicPlane(0).displayHardware();
@@ -707,6 +716,7 @@ void SurfaceFlinger::handlePageFlip()
 
             mWormholeRegion = screenRegion.subtract(opaqueRegion);
             mVisibleRegionsDirty = false;
+            mHwWorkListDirty = true;
         }
 
     unlockPageFlip(currentLayers);
@@ -737,6 +747,21 @@ void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
     }
 }
 
+void SurfaceFlinger::handleWorkList()
+{
+    mHwWorkListDirty = false;
+    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
+    if (hwc.initCheck() == NO_ERROR) {
+        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
+        const size_t count = currentLayers.size();
+        hwc.createWorkList(count);
+        HWComposer::iterator cur(hwc.begin());
+        HWComposer::iterator last(hwc.end());
+        for (size_t i=0 ; (i<count) && (cur!=last) ; ++i, ++cur) {
+            currentLayers[i]->setGeometry(cur);
+        }
+    }
+}
 
 void SurfaceFlinger::handleRepaint()
 {
@@ -801,15 +826,63 @@ void SurfaceFlinger::composeSurfaces(const Region& dirty)
         // draw something...
         drawWormhole();
     }
+
+    status_t err = NO_ERROR;
     const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
     const size_t count = layers.size();
+
+    const DisplayHardware& hw(graphicPlane(0).displayHardware());
+    HWComposer& hwc(hw.getHwComposer());
+    HWComposer::iterator cur(hwc.begin());
+    HWComposer::iterator last(hwc.end());
+
+    // update the per-frame h/w composer data for each layer
+    if (cur != last) {
+        for (size_t i=0 ; i<count && cur!=last ; ++i, ++cur) {
+            layers[i]->setPerFrameData(cur);
+        }
+        err = hwc.prepare();
+        LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
+    }
+
+    // and then, render the layers targeted at the framebuffer
+    Region transparent(hw.bounds());
     for (size_t i=0 ; i<count ; ++i) {
+
+        // see if we need to skip this layer
+        if (!err && cur != last) {
+            if (!((cur->compositionType == HWC_FRAMEBUFFER) ||
+                    (cur->flags & HWC_SKIP_LAYER))) {
+                ++cur;
+                continue;
+            }
+            ++cur;
+        }
+
+        // draw the layer into the framebuffer
         const sp<LayerBase>& layer(layers[i]);
+        transparent.subtractSelf(layer->visibleRegionScreen);
         const Region clip(dirty.intersect(layer->visibleRegionScreen));
         if (!clip.isEmpty()) {
             layer->draw(clip);
         }
     }
+
+    // finally clear everything we didn't draw as a result of calling
+    // prepare (this leaves the FB transparent).
+    transparent.andSelf(dirty);
+    if (!transparent.isEmpty()) {
+        glClearColor(0,0,0,0);
+        Region::const_iterator it = transparent.begin();
+        Region::const_iterator const end = transparent.end();
+        const int32_t height = hw.getHeight();
+        while (it != end) {
+            const Rect& r(*it++);
+            const GLint sy = height - (r.top + r.height());
+            glScissor(r.left, sy, r.width(), r.height());
+            glClear(GL_COLOR_BUFFER_BIT);
+        }
+    }
 }
 
 void SurfaceFlinger::unlockClients()

services/surfaceflinger/SurfaceFlinger.h

@@ -296,6 +296,7 @@ private:
             void        handlePageFlip();
             bool        lockPageFlip(const LayerVector& currentLayers);
             void        unlockPageFlip(const LayerVector& currentLayers);
+            void        handleWorkList();
             void        handleRepaint();
             void        postFramebuffer();
             void        composeSurfaces(const Region& dirty);
@@ -370,6 +371,7 @@ private:
                 Region                      mInvalidRegion;
                 Region                      mWormholeRegion;
                 bool                        mVisibleRegionsDirty;
+                bool                        mHwWorkListDirty;
                 bool                        mDeferReleaseConsole;
                 bool                        mFreezeDisplay;
                 int32_t                     mFreezeCount;